So, yeah. New character. Level 1. Keeping her that way until I figure out how I want to build her.

And there I was walking out of the general store in Winterhold when I spotted someone running down the street at full tilt. Finally caught up to her just beneath the bridge crossing over to the college, and to my surprise it's a vampire fledgling. I kept clicking on her but she said nothing, nor was she hostile to me. She just kept running. Finally, after getting further away from Winterhold, clicking on her yielded a "Don't speak to me, meat!" response (at which point I immediately regretted not naming my character "meat").

Out of curiosity, I kept following her just to see where she was headed. She eventually ducked inside Septimus Sigmus's Outpost at which she point she promptly disappeared.

So, I reloaded and this time I killed her which netted me an assault on the crime sheet. She wasn't carrying anything out of the ordinary. Just the usual vampire crap. I was almost expecting her to be carrying a note because she was moving like one of those Imperial/Stormcloak couriers you run into every now and again. Very strange. Especially so, given my level. Anyone else have a similar experience?

I had a similar experience at a higher level though.

Found a random vampire, followed her for a long while until she got stuck on some rocks down by a river. I was attacked by a slaughterfish down by the water so I shot it with an arrow, then the vampire freaked out and started begging for mercy. She turned invisible and ran far, far away. I followed her, she kept cowering behind trees and rocks until I finally lost sight of her.

Saw the same thing early on in one game, about level 8: I was at Whiterun about to do some business with the Khajit caravan when a vampire fledgeling just goes running by. I exited the dialogue and chased her down and killed her near the stables.

Slightly similar experience, fresh out of Helgin making my way towards Falkreath and in the distance I spotted two gargoyles. Needless to say I turned around and ran as fast as I could to riverwood.

That is interesting, I finished Dawnguard, and never once did I encounter this, but maybe I just never noticed it. Curious why they would not be attacked by city guards.

Yeah, the guards paid her no mind. I almost didn't notice her myself as she was nearly out of sight before I just happened to be facing the right way and caught a glimpse of her.

Huh. Maybe Beth coded some "foreshadowing" encounters?